Passages: The Amazing Adventures of Kavalier & Clay

From Michael Chabon's Pulitzer-winning, heartbreaking, flat-out brilliant novel:

As they made their way through the increasing gloom, Joe seemed to steer only according to the light shed by the action of her palm against his wrist, by the low steady flow of voltage through the conducting medium of their sweat. He stumbled like a drunken man and laughed as she hurried him along. He was vaguely aware of the ache in his hand, but he ignored it. As they turned the landing to the top floor, a strand of her hair caught in the corner of his mouth, and for an instant he crunched it between his teeth.